currentData = superData;
            } else if (!parentIds.add(parentData.getId())) {
                StringBuilder message = new StringBuilder("The parents form a cycle: ");
                for (String parentId : parentIds) {
                    message.append(parentId).append(" -> ");
                }
                message.append(parentData.getId());

    private MavenProject topLevelProject;

    private ProjectDependencyGraph projectDependencyGraph;

    private boolean parallel;

    /**
     * Plugin context keyed by project ({@link MavenProject#getId()}) and by plugin lookup key
     * ({@link PluginDescriptor#getPluginLookupKey()}). Plugin contexts itself are mappings of {@link String} keys to
     * {@link Object} values.
     */

public interface Artifact {
    /**
     * {@return a unique identifier for this artifact}
     * The identifier is composed of groupId, artifactId, extension, classifier, and version.
     *
     * @see ArtifactCoordinates#getId()
     */
    @Nonnull
    default String key() {
        String c = getClassifier();
        return getGroupId()
                + ':'
                + getArtifactId()
                + ':'

            if (pluginExecutionId != null && !pluginExecutionId.isEmpty()) {
                for (PluginExecution execution : plugin.getExecutions()) {
                    if (pluginExecutionId.equals(execution.getId())) {
                        setConfiguration(execution.getConfiguration());
                        break;
                    }
                }
            } else {

    public static final String RS_TEST_COMPILE = "test-compile";
    public static final String RS_TEST_RUNTIME = "test-runtime";

    private Maven3ScopeManagerConfiguration() {}

    @Override
    public String getId() {
        return "Maven3";
    }

    @Override
    public boolean isStrictDependencyScopes() {
        return false;
    }

    @Override
    public boolean isStrictResolutionScopes() {

        if (configMap == null) {
            return Collections.emptyMap();
        }
        return configMap;
    }

    @Override
    public String getId() {
        return asDocMeta().id();
    }

    public void setId(final String id) {
        asDocMeta().id(id);
    }

    public Long getVersionNo() {
        return asDocMeta().version();
    }

      if (leftCode != rightCode) {
        return leftCode < rightCode ? -1 : 1;
      }

      // identityHashCode collision (rare, but not as rare as you'd think)
      int result = getUid(left).compareTo(getUid(right));
      if (result == 0) {
        throw new AssertionError(); // extremely, extremely unlikely.
      }
      return result;
    }

    @Override
    public String toString() {

        List<Artifact> trial = getTrail();

        List<String> ret = new ArrayList<>(trial.size());

        for (Artifact artifact : trial) {
            ret.add(artifact.getId());
        }

        return ret;
    }

    private List<Artifact> getTrail() throws OverConstrainedVersionException {
        if (trail == null) {
            List<Artifact> ids = new LinkedList<>();

        }
    }

    private static String getExecutionId(Plugin plugin, String goal) {
        Set<String> existingIds = plugin != null
                ? plugin.getExecutions().stream().map(PluginExecution::getId).collect(Collectors.toSet())
                : Set.of();
        String base = "default-" + goal;
        String id = base;
        for (int index = 1; existingIds.contains(id); index++) {

        requireNonNull(parserRequest);

        LocalContext context = new LocalContext(parserRequest);

        // the basics
        context.cwd = requireNonNull(getCwd(context));
        context.installationDirectory = requireNonNull(getInstallationDirectory(context));
        context.userHomeDirectory = requireNonNull(getUserHomeDirectory(context));

        // top/root